汽车维修设备使用心得

一、轮胎平衡机真的坏了吗?两个维修工围着Beissbarth轮胎平衡机忙活了半天,最后一脸沮丧地找到我说“Beissbarth轮胎平衡机坏了”。听完他俩的诉说,我半信半疑地来到轮胎平衡机前,让他们重新操作了一遍,的确是没有办法使轮胎平衡。按照平衡机的指示位置,装上所需克数的铅块,放     

意大利科吉春季汽保展展出新品

意大利科吉公司在日前结束的北京春季汽保展上展出了代表其顶尖科技的原装进口设备,Master26轮胎拆装机和“蓝光”电子轮胎平衡机,成为了展会的亮点。     

替换胎市场的专家——固铂轮胎在中国的发展

作为北美第二大上市轮胎公司，固铂专注于替换胎市场，并且奠定了其全球轮胎替换专家的地位。固铂旗下的制造及研发基地遍布北美、欧洲及亚洲三大洲，其产品涵盖了多级轮胎市场，从家用轿车到豪华跑车，从越野车到大货车，从动力单车到超级摩托车，甚至应对极端环境的专用轮胎及赛车专用轮胎。     

科吉:一个发生在意大利的故事

科吉公司成立于1954年,由埃尔米尼奥和雷默·科吉兄弟创建。汽车行业在20世纪60年代获得爆炸性发展,科吉兄弟发明了世界上第一台轮胎拆装机并申请了专利,从此科吉的业务飞速发展,丰富的产品线涵盖了轮胎拆装机、四轮定位仪、轮胎平衡机、举升机等。轮胎拆装机系列轮胎拆装机Artiglio 50作为首先于2001年提出并实现"无撬棒"技术的科吉,Artiglio 50是该技术的完美呈现,使用A50无须担心损伤轮胎轮辋;独特拆装工具,最大程度减少轮胎张力,避免划伤轮胎轮辋;经实践证明拆装SR轮胎的最佳设备;可拆装市面上所有的小车胎及轻卡胎(防爆胎,低扁平胎等)。最大拆装范围至30’;最大轮胎直径47’;     

应用计算机模拟技术开发的轮胎--日本东洋轮胎与橡胶工业公司新技术介绍

在日本国内依然对小型厢式车（minivan）市场看好的情况下．日本国内轮胎制造商正在不断开发并销售小型厢式车专用轮胎。东洋轮胎与橡胶工业公司(Toyo Tire ＆ Rubber Co.Ltd)是最初开发这种配套产品的制造公司。现今，该公司的小型厢式车专用轮胎已发展到第三代TRANPAS MP3。此外年初该公司推出了轿车用新型舒适型轮胎PROXES CTO1。     

汽车养护

韩泰轮胎两款全新卡车专用轮胎DM85和DM86 9月10日，全球领先、同时也是成长最快的轮胎生产制造商之一的韩泰轮胎宣布，在中国市场推出两款全新卡车专用轮胎，这两款轮胎分别为适用于中短途混合路面的翻斗车单导向驱动轮轮胎DM85，和矿山专用轮胎DM86。这两款产品在耐久性和载重能力方面性能优越，成为韩泰轮胎发力卡客车市场的有力产品．     

Hot

嘘,静谧的世界 邓禄普轮胎SP SPORT LM703, MPV专用“鞋”邓禄普轮胎SP SPORT RV 502，越野轮胎开山始祖 固特异Wrangler AT/R,进军配套市场 锦湖KH18轮胎，绿色环保轮胎 库珀成山轮胎RS·R 1.0.[编者按]     

专业·高效 专访米其林卡客车轮胎部高级副总裁夏茂廷先生

<正>为了服务于全世界最有潜力的市场,米其林为中国用户推出了两款节能、高效的卡车轮胎—XZA 2 Energy、XTE 2。前者是目前国内长途运输市场上唯一一款有内胎绿色节油轮胎,而XTE2是国内第一款挂车专用轮胎。来到     

玲珑“省钱专家”卡客车轮胎上市

玲珑轮胎日前推出了卡客车驱动轴专用及导向轮专用省油产品——DL810和TL809两款花纹轮胎。这两款轮胎凭借较低的滚动阻力、更优化的花纹设计和更强壮的胎体结构,保证了产品的最佳使用效果,为广大卡客车用户提供了更加安全、更加经济的轮胎使用方案。     

汽车轮胎电脑平衡机的开发研究

本文介绍了汽车轮胎电脑平衡机结构原理，重点分析影响平衡严谨的关键因素－－相位，然后介绍结合我国国情开发的平衡机的软、硬件构成和特点．     

一种新型电热压轮胎修补机

目前，市场上所使用的能兼顾内、外胎修补的电热补胎机，功率大，且需要专门配置温度控制系统，结构复杂，成本高。现设计一种新型电热压补胎机，选用新型加热元件，自动恒温，功率小，结构简单，质量轻，便于携带。详细介绍了该机的技术参数、基本结构和主要特点。     

轮胎压路机驱动方式的对比分析

通过对现有市场上的轮胎压路机机械传动、液力传动、液压传动3种传动方式的对比分析，归纳出其优缺点，综合分析得出液压传动的轮胎压路机在性能、工作效率、维护保养、驾驶的舒适性方面有着较为明显的优势。     

军车轮胎评价指标体系探究

简述了国内外军用车辆配套轮胎发展现状,分析了军用车辆对轮胎的特殊技术要求,根据轮胎与整车性能的相关性分析,运用系统分析和逻辑推理的方法,分别从单胎和整车两个角度构建了军车轮胎的评价指标体系,为军车的轮胎选型、设计和试验评价提供了借鉴。     

Identification of the mechanical properties of bicycle tyres for modelling of bicycle dynamics

Advanced simulation of the stability and handling properties of bicycles requires detailed road–tyre contact models. In order to develop these models, in this study, four bicycle tyres are tested by means of a rotating disc machine with the aim of measuring the components of tyre forces and torques that influence the safety and handling of bicycles. The effect of inflation pressure and tyre load is analysed. The measured properties of bicycle tyres are compared with those of motorcycle tyres.     

Noise,vibration, harshness model of a rotating tyre

ABSTRACT

The tyre plays a fundamental role in the generation of acoustically perceptible driving noise and vibrations inside the vehicle. An essential part of these vibrations is induced by the road excitation and transferred via the tyre into the vehicle. There are two basic ways to study noise, vibration, harshness (NVH) behaviour: Simulations in time and frequency domains. Modelling the tyre transfer behaviour in frequency domain requires special attention to the rotation of the tyre. This paper shows the approach taken by the authors to include the transfer behaviour in the frequency range up to 250?Hz from geometric road excitations to resulting spindle forces in frequency domain. This paper validates the derived NVH tyre model by comparison with appropriate transient simulations of the base transient model.     

Micro-shimmy of towed structures in experimentally uncharted unstable parameter domain

In this paper, the lateral instability of towed structures (trailers, caravans and articulated buses) is investigated with special attention to the small amplitude lateral vibration that leads to a higher energy consumption in certain parameter domains. A low degree-of-freedom mechanical model of a shimmying towed tyre is used that describes the dynamics of the tyre–ground contact patch by the time delayed differential equation. Stability charts are calculated and the theoretically predicted linear unstable islands of small amplitude shimmy motions are validated by laboratory experiments. A tyre is towed by a relatively long caster, and its temperature and the input current of the conveyor belt are measured in order to show the increased value of the rolling resistance.     

User-Appropriate Tyre-Modelling for Vehicle Dynamics in Standard and Limit Situations

Summary When modelling vehicles for the vehicle dynamic simulation, special attention must be paid to the modelling of tyre-forces and -torques, according to their dominant influence on the results. This task is not only about sufficiently exact representation of the effective forces but also about user-friendly and practical relevant applicability, especially when the experimental tyre-input-data is incomplete or missing. This text firstly describes the basics of the vehicle dynamic tyre model, conceived to be a physically based, semi-empirical model for application in connection with multi-body-systems (MBS). On the basis of tyres for a passenger car and a heavy truck the simulated steady state tyre characteristics are shown together and compared with the underlying experimental values. In the following text the possibility to link the tyre model TMeasy to any MBS-program is described, as far as it supports the 'Standard Tyre Interface' (STI). As an example, the simulated and experimental data of a heavy truck doing a standardized driving manoeuvre are compared.     

Identification of the characteristics of motorcycle and scooter tyres in the presence of large variations in inflation pressure

Stability and safety of road vehicles are largely affected by tyre properties. Single-track vehicles are characterised by weakly damped modes of vibration (weave and wobble) and therefore this phenomenon is even more important. This article focuses on the study of both steady-state and transient properties of motorcycle and scooter tyres in the presence of very low and very high inflation pressures. The steady-state properties are defined as lateral forces (side-slip and camber forces) and yaw torques (self-aligning and twisting). The transient properties are described in terms of relaxation length, which represents the distance needed to reach a certain percentage of the steady-state value of the tyre force. Experimental tests are carried out on a specific rotating disk machine. Three sets of tyres are analysed. Steady-state properties are measured by increasing step by step the values of camber and side-slip angles. Transient properties are studied carrying out tests with harmonic side-slip excitation and measuring the phase lag between the excitation (input) and the tyre force (output). Experimental results show important variations in tyre properties with inflation pressure with general trends of all the tested tyres and particular features related to the tyre's geometry. After the analysis and discussion of experimental results, the measured data are fitted by means of a specific version of the Magic Formula. The dependence of the Magic Formula's coefficients on inflation pressure is analysed and interpolation curves are given.     

Design of tyre force excitation for tyre–road friction estimation

Knowledge of the current tyre–road friction coefficient is essential for future autonomous vehicles. The environmental conditions, and the tyre–road friction in particular, determine both the braking distance and the maximum cornering velocity and thus set the boundaries for the vehicle. Tyre–road friction is difficult to estimate during normal driving due to low levels of tyre force excitation. This problem can be solved by using active tyre force excitation. A torque is added to one or several wheels in the purpose of estimating the tyre–road friction coefficient. Active tyre force excitation provides the opportunity to design the tyre force excitation freely. This study investigates how the tyre force should be applied to minimise the error of the tyre–road friction estimate. The performance of different excitation strategies was found to be dependent on both tyre model choice and noise level. Furthermore, the advantage with using tyre models with more parameters decreased when noise was added to the force and slip ratio.